Problem 156. Parasitic numbers

Difficulty:Rate

Test whether the first input x is an n-parasitic number: http://en.wikipedia.org/wiki/Parasitic_number. ( n is the second input.)

Examples:

parasitic(128205,4) ---> true

parasitic(179487,4) ---> true

parasitic(179487,3) ---> false

Solve

Last Solution submitted on Feb 09, 2025

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John D'Errico on 30 Sep 2016

I've added some test cases, that will make it a bit more difficult to game this problem.

JD on 7 Nov 2016

Cases 5 and 7 are identical, and I believe they are both wrong. 5 x 142857 = 714285. Isn't this a parasitic number? What am I missing?

Jess Stuart on 8 Feb 2017

Can the problem creator disqualify "solutions" that cheat? There should be a point penalty (-200) associated with cheating too.

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